But then we'd have to deal with drag and friction in space. And we already use anything burnable on earth as fuel, we just need to bring oxygen along too.
So, would the weight of the oxygen that you're not bringing outweigh the drag?

For the fuel comment, I meant we wouldn't need to have special fuel. You could burn wood, for example. (Doesn't make sense, but since there's oxygen to eat away, anything that can burn can be used as ship fuel.)

Drag wouldn't be an issue, as I believe vehicles such as commercial jets, and rockets are enough to be aerodynamic. Correct me if I'm wrong there, though.

They're aerodynamic but given the infinite expanse of space they'd still slow to a stop if left in an enormous plane of air

Not to mention there'd be terminal velocity to worry about. There's only so aerodynamic you can get so there'd be a limit to how fast you could go. Also, do you mean all vacuums or just space? Cause that's a pretty important distinction.

I would increase the elasticity of everything one-hundredfold. Everything would be super durable, because it would just deform instead of breaking. The world would be a lot funnier if this:



Was everyone.

I would destroy all witches before their inception so that magical girls would never have to cry again.


Or maybe I'd change the speed of light to be something kind of slow. That would be funny.

Oh man if the SOL was slow that would be so trippy.
Imagine turning on a light and then light slowly coming out in a sphere shape.

Haha, awesome.

It would be cool for the first month or two, but then the trippyness would wear off, and it would just be a hassle to wait for them. But it would still be pretty cool to look at.

The way I think of time travel is this: You can't change the past for any reason ever without causing a paradox. If you go back and change anything, you would have no memory of it happening, thus no motivation to go back and change it, causing it to happen causing you to change it causing it to not happen causing you to not change it causing it to happen causing you to change it causing it to not happen causing you to not change it causing it to happen causing you to change it causing it to not happen causing you to not change it causing it to happen causing you to change it causing it to not happen causing you to not change it causing it to happen causing you to change it causing it to not happen causing you to not change it causing it to happen causing you to change it causing it to not happen causing you to not change it causing it to happen causing you to change it causing it to not happen causing you to not change it causing it to happen causing you to change it causing it to not happen causing you to not change it.

Or it'd just break the "timeline" in thousands of places creating tons of alternate realities.

Theoretically, every single decision made creates another timeline, and those are all modified by all past, previous, and future decisions.

Therefore it is possible that there is a separate timeline where the entire world has been destroyed, and another where the world is totally eco-friendly and pristine.

Nah there's the countless numbers of universes where the earth never formed in the first place, aswell as a slightly smaller countless number of universes where we're eco friendly hippies.

Is there a universe where I'm black?